User manual

28
Interface log
The RS-232 interface uses the following date format:
Baud rate: 2400
Port: COM1
Parity: None
Data length: 8 bit
Stop bit: 1
A hi-level start bit is sent to start data transfer. This is followed by the data word beginning with the LSB
(lower significant Bit) up to the MSB (most significant Bit) and is terminated by a lo-level stop Bit.
Example: For the hex number 61H (0110001 binary), the data package looks as follows:
Start 1 0 0 0 1 1 0 Stop
Each data command consists of three bytes. The function byte and the two data bytes.
The following functions are available:
1. V
oltage setting „Uo“: (AAh) (V1) (V2)
V1 higher byte (only the lowest 4 bit are considered)
V2 lower byte
2. Initial setting:
(ABh) (S) (R)
S 1: Sets the DC-output to active (ON)
0: Sets the DC-output to inactive (OFF)
R Reserved (stays on 0h)
3. Current limitation „Imax“:
(ACh) (I1) (I2)
I1 higher byte (only the lowest 4 bit are considered)
I2 lower byte
The setting is made without decimal places, e.g. for 0 to 5.00 A = 0 - 500 (= 0 - 1F4h)
4. V
oltage limitation „Umax“: (ADh) (V1) (0)
V1 range
The setting is made without decimal places, e.g. for 0 to 40.0 V = 0 - 400 (= 0 - 190h)
5. Reading of the output voltage “Uo”:
(AEh) (0) (0)
Response: (AEh) (V1)(V2)
V1 higher byte
V2 lower byte
6. Reading of the output current “Io”:
(AEh) (0) (0)
Response: (AEh) (I1)(I2)
I1 higher byte
I2 lower byte